The advantage of data on disk-based systems, however, is that they are automated in line with pre-set policies.
This means that administration costs are reduced, not least because valuable resource can be deployed elsewhere.
Moreover, because information is stored in blocks, it is no longer necessary to continue backing up entire files once even small changes are made.
Instead only the changes themselves are backed up, which inevitably saves a lot of time.
But yet another driver behind the increasingly widespread modernisation that is taking place relates to the notorious unreliability of tape-based systems.
The disaster recovery industry points to the fact that as many as 40 per cent of attempts to recover data from tape fail, while Gartner puts the figure as high as 72 per cent.